Cell Processes and Energy

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element

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any substance that cannot be broken down into simpler substances

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compound

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two or more elements that are chemically combined

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carbohydrate

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an energy-rich organic compound made of the elements carbon, hydrogen, and oxygen

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lipid

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energy-rich organic compound that is made of carbon, hydrogen, and oxygen

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protein

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large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur

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amino acid

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a small molecule that is linked chemically to other amino acids to form proteins

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enzyme

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a protein that speeds up chemical reactions in a living thing

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nucleic acid

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very large organic molecule made of carbon, oxygen, hydrogen, nitrogen, and phosphorus, that contains the instructions cells need to carry out all the functions of life

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DNA

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the genetic material that carries information about an organism and is passed from parent to offspring

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RNA

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a nucleic acid that plays an important role in the production of proteins